Composition for controlling ambient humidity

Abstract

A composition for controlling ambient humidity within 45%˜55%. The composition includes at least one organic acid salt, at least one of polyol and water. The organic acid salt includes at least one of sodium lactate, potassium lactate and sodium formate. The count of carbon in the polyol is not greater than 5. The weight percentage of the organic acid salt in the composition is 30.6%-58.8%. The weight percentage of the polyol in the composition is 9.3%-26.7%. The composition can control the ambient humidity within 45%˜55% without the need to pre-adjust the objective space. The composition has a large capacity of moisture absorption and desorption, and can quickly achieve the desired humidity in the objective environment.

The invention claimed is: 
     
       1. An ambient humidity controlling composition for controlling ambient humidity within 45%-55%, comprising:
 an organic acid salt, at least one polyol and water; 
 the organic acid salt is sodium lactate; 
 said at least one polyol is ethylene glycol; 
 a weight percentage of the organic acid salt in the composition is 44.4%-46.2%; and 
 a weight percentage of said at least one polyol in the composition is 13.3%-20.5%. 
 
     
     
       2. The ambient humidity controlling composition for controlling ambient humidity according to  claim 1 , wherein the controlling ambient humidity is 45%, the weight percentage of the organic acid salt in the composition is 45.5%, and the weight percentage of said at least one polyol in the composition is 20.5%. 
     
     
       3. The ambient humidity controlling composition for controlling ambient humidity according to  claim 1 , wherein the controlling ambient humidity is 50%, the weight percentage of the organic acid salt in the composition is 46.2%, and the weight percentage of said at least one polyol in the composition is 16.1%. 
     
     
       4. The ambient humidity controlling composition for controlling ambient humidity according to  claim 1 , wherein the controlling ambient humidity is 55%, the weight percentage of the organic acid salt in the composition is 44.4%, and the weight percentage of said at least one polyol in the composition is 13.3%.